Two rods of the same length and areas of cross-section `A_1` and `A_2` have their ends at the same temperature. `K_1` and `K_2` are the thermal conductivities of the two rods. The rate of flow of heat is same in both the rods if-

Options

A. `A_(1)/A_(2)=L_(1)/K_(2)`
B. `A_(1)/A_(2)=K_(2)/K_(1)`
C. `A_(1)A_(2)=K_(1)K_(2)`
D. placed in hot oil

Answer

B